CAJ | 학술논문

目的分析中国内地人感染H7N9禽流感疫情.方法以2013年以来我国内地报告的确诊H7N9禽流感病例为研究对象,采用描述性流行病学方法分析病例的时间、空间和人群分布特点.结果截至2014年6月4日中国内地共确诊人感染H7N9禽流感病例433例,死亡163人.2013年3-4月及2014年1-2月分别为2个发病高峰.病例分布在14个省(市),报告病例数前五位的省份为浙江、广东、江苏、上海、湖南,占总报告病例数的85％;病例年龄1～91岁(M=58岁);男性占70％.82％的病例在发病前有活禽相关的暴露史.共发生14起聚集性病例,其中9起发生人传人的可能性大.结论中国内地人感染H7N9禽流感疫情有较明显的季节分布特点,同时呈现一定的区域聚集性;感染人群以老年人为主,男性多于女性;感染来源主要为禽类.
목적 분석중국내지인감염H7N9금류감역정.방법 이2013년이래아국내지보고적학진H7N9금류감병례위연구대상,채용묘술성류행병학방법분석병례적시간、공간화인군분포특점.결과 절지2014년6월4일중국내지공학진인감염H7N9금류감병례433례,사망163인.2013년3-4월급2014년1-2월분별위2개발병고봉.병례분포재14개성(시),보고병례수전오위적성빈위절강、엄동、강소、상해、호남,점총보고병례수적85％;병례년령1～91세(M=58세);남성점70％.82％적병례재발병전유활금상관적폭로사.공발생14기취집성병례,기중9기발생인전인적가능성대.결론 중국내지인감염H7N9금류감역정유교명현적계절분포특점,동시정현일정적구역취집성;감염인군이노년인위주,남성다우녀성;감염래원주요위금류.
Objective To investigate the epidemiological characteristics of human infections with avian influenza A (H7N9) in China and to provide scientific evidence for the adjustment of preventive strategy and control measures.Methods Demographic and epidemiologic information on human cases were collected from both reported data of field epidemiological investigation and the reporting system for infectious diseases.Results A total of 433 cases including 163 deaths were reported in mainland China before June 4,2014.Two obvious epidemic peaks were noticed,in March to April,2013 and January to February,2014.Confirmed cases emerged in 14 areas of China.Five provinces,including Zhejiang,Guangdong,Jiangsu,Shanghai,and Hunan,reported about 85％ of the total cases.Median age of the confirmed cases was 58 years (range,1-91),with 70％ as males.Of the 418 cases with available data,87％ had ever exposed to live poultry or contaminated environments.14 clusters were identified but human to human transmission could not be ruled out in 9 clusters.Conclusion Human infections with avian influenza A (H7N9) virus showed the characteristics of obvious seasonal distribution,with certain regional clusters.The majority of confirmed cases were among the elderly,with more males seen than the females.Data showed that main source of infection was live poultry and the live poultry market had played a significant role in the transmission of the virus.